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What is a precipitate and how does it help recognize that a chemical reaction has occurred?
A precipitate is a solid formed in a solution during a chemical reaction. A precipitate forms when two soluble substances react to produce an insoluble product. The presence of a precipitate indicates that a chemical reaction has occurred, as it is a visible sign of a change in the chemical composition of the solution.
Explain why calcium hydroxide can be used in this way?
Calcium hydroxide is used to test for carbon dioxide because the product of the reaction, calcium carbonate, is insoluble, and easily visible.
what shade of visible light does it produce?
Blue
What is the interaction of factors in the blood to produce a visible clot?
coagulation
Are signs of chemical reaction always visible?
No, signs of a chemical reaction are not always visible. Some reactions may be characterized by changes in temperature, the formation of gas, color changes, or the production of precipitates that are visible to the naked eye. However, some reactions, particularly those that are slow or occur in the solution phase, may not exhibit obvious visible signs.
What does acid plus carbonate produce?
Acid plus carbonate produces carbon dioxide gas, water, and a salt. This reaction is a chemical reaction known as neutralization. The carbon dioxide gas is the most visible product, often seen as bubbles.
What will be the problem when you mix vinegar and baking soda?
A chemical reaction will take place, and that reaction will produce sodium acetate, water, and carbon dioxide gas. Reaction is visible as foaming and sizzling.
What is a precipitate and how does it help recognize that a chemical reaction has occurred?
A precipitate is a solid formed in a solution during a chemical reaction. A precipitate forms when two soluble substances react to produce an insoluble product. The presence of a precipitate indicates that a chemical reaction has occurred, as it is a visible sign of a change in the chemical composition of the solution.
Is the absorption of light and chemicals produce a chemical reaction?
Yes, it is possible; photochemistry study the chemical reactions caused by visible and ultraviolet light.
Explain why calcium hydroxide can be used in this way?
Calcium hydroxide is used to test for carbon dioxide because the product of the reaction, calcium carbonate, is insoluble, and easily visible.
Does no visible change mean no chemical reaction?
Not necessarily. A lack of visible change does not always indicate the absence of a chemical reaction. Some reactions may be occurring at a molecular level and not produce a noticeable alteration in appearance. It's important to consider other evidence, such as changes in temperature, gas production, or pH level, to determine if a chemical reaction has taken place.
What happens when you mix Sodium Acetate with NaOH?
When Sodium Acetate is mixed with NaOH, a double displacement reaction occurs, leading to the formation of water and sodium hydroxide, along with sodium acetate. The reaction can be represented as follows: CH3COONa + NaOH → CH3COONa + H2O The sodium acetate remains in the solution, while water and sodium hydroxide are formed as byproducts.
Is gas produced when you add acid to chalk?
Yes, when an acid such as hydrochloric acid is added to chalk (calcium carbonate), it reacts to produce carbon dioxide gas, calcium chloride, and water. The carbon dioxide gas is the visible product of this reaction.
what shade of visible light does it produce?
Blue
What are objects that produce visible called?
Illuminated objects
What describes the visible light given off by a chemical reaction?
The visible light emitted by a chemical reaction is a type of luminescence known as chemiluminescence. It occurs when a chemical reaction produces light as a byproduct, typically as a result of excited molecules releasing energy in the form of photons in the visible range. Chemiluminescence is commonly seen in glow sticks and fireflies.
What are some examples of items that produce visible light?
a mirror
